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I have a model dialog. I overrided OnCancel function to stop unexpected exiting by pressing ESC button. But this caused a new problem. I can't close the application by using close (x) button. My implementation of function is:
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OnCancel is called by pressing the x button or by pressing escape, and there's no way to tell within the function. You could add a message dialog to ask if the user is sure they want to quit, or look at trapping the escape key-press specifically. – Grimm The Opiner Mar 23 '12 at 11:17
Closing a dialog effectively cancels it. Since you have disabled close in your OnCancel handler, then nothing will happen.
To disable ESC only, you need to preprocess the keyboard messages:
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I implemented your solution. It's works fine... But I have an another question how to stop exiting while pressing ESC button ? – Riskhan Mar 23 '12 at 11:22
I think it's better to do is in another way: "typedef CDialog base_class", then call "base_class::OnCancel();" instead of using VC-specific __super keyword. – Raxillan Mar 23 '12 at 11:22
@krish Just call base OnCancel() only then you need to exit dialog. I.e. use "if" statement. – Raxillan Mar 23 '12 at 11:24
@GazTheDestroyer Thank you for better solution, It's working now. – Riskhan Mar 23 '12 at 11:29
@Raxillan I go with GazTheDestroyer's solution, thank you for answer – Riskhan Mar 23 '12 at 11:30
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28.03.2014, 13:45. Просмотров 3093. Ответов 1
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// Mouse_MessagesDlg.cpp : implementation file
//
#include "stdafx.h"
#include "Mouse_Messages.h"
#include "Mouse_MessagesDlg.h"
#include "afxdialogex.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#endif
// CAboutDlg dialog used for App About
class CAboutDlg : public CDialogEx
{
public:
CAboutDlg();
// Dialog Data
enum { IDD = IDD_ABOUTBOX };
protected:
virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support
// Implementation
protected:
DECLARE_MESSAGE_MAP()
};
CAboutDlg::CAboutDlg() : CDialogEx(CAboutDlg::IDD)
{
}
void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
CDialogEx::DoDataExchange(pDX);
}
BEGIN_MESSAGE_MAP(CAboutDlg, CDialogEx)
END_MESSAGE_MAP()
// CMouse_MessagesDlg dialog
CMouse_MessagesDlg::CMouse_MessagesDlg(CWnd* pParent /*=NULL*/)
: CDialogEx(CMouse_MessagesDlg::IDD, pParent)
{
m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}
void CMouse_MessagesDlg::DoDataExchange(CDataExchange* pDX)
{
CDialogEx::DoDataExchange(pDX);
}
BEGIN_MESSAGE_MAP(CMouse_MessagesDlg, CDialogEx)
ON_WM_SYSCOMMAND()
ON_WM_PAINT()
ON_WM_QUERYDRAGICON()
ON_WM_MOUSEMOVE()
ON_BN_CLICKED(IDC_Point, &CMouse_MessagesDlg::OnBnClickedPoint)
ON_BN_CLICKED(IDC_Line, &CMouse_MessagesDlg::OnBnClickedLine)
// ON_WM_LBUTTONUP()
ON_WM_LBUTTONDOWN()
ON_BN_CLICKED(IDC_BTN_Pencil, &CMouse_MessagesDlg::OnBnClickedBtnPencil)
ON_BN_CLICKED(IDC_BTN_Rect, &CMouse_MessagesDlg::OnBnClickedBtnRect)
ON_BN_CLICKED(IDC_BTN_Elipse, &CMouse_MessagesDlg::OnBnClickedBtnElipse)
ON_BN_CLICKED(IDC_BTN_Airbrush, &CMouse_MessagesDlg::OnBnClickedBtnAirbrush)
ON_BN_CLICKED(IDC_BTN_Eraser, &CMouse_MessagesDlg::OnBnClickedBtnEraser)
ON_BN_CLICKED(IDC_BTN_Color, &CMouse_MessagesDlg::OnBnClickedBtnColor)
ON_BN_CLICKED(IDC_BTN_Polygon, &CMouse_MessagesDlg::OnBnClickedBtnPolygon)
END_MESSAGE_MAP()
// CMouse_MessagesDlg message handlers
BOOL CMouse_MessagesDlg::OnInitDialog()
{
CDialogEx::OnInitDialog();
// Add "About..." menu item to system menu.
// IDM_ABOUTBOX must be in the system command range.
ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
ASSERT(IDM_ABOUTBOX < 0xF000);
CMenu* pSysMenu = GetSystemMenu(FALSE);
if (pSysMenu != NULL)
{
BOOL bNameValid;
CString strAboutMenu;
bNameValid = strAboutMenu.LoadString(IDS_ABOUTBOX);
ASSERT(bNameValid);
if (!strAboutMenu.IsEmpty())
{
pSysMenu->AppendMenu(MF_SEPARATOR);
pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
}
}
// Set the icon for this dialog. The framework does this automatically
// when the application's main window is not a dialog
SetIcon(m_hIcon, TRUE); // Set big icon
SetIcon(m_hIcon, FALSE); // Set small icon
// TODO: Add extra initialization here
flagBtn = 0;
color = RGB(0,0,0);
return TRUE; // return TRUE unless you set the focus to a control
}
void CMouse_MessagesDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
if ((nID & 0xFFF0) == IDM_ABOUTBOX)
{
CAboutDlg dlgAbout;
dlgAbout.DoModal();
}
else
{
CDialogEx::OnSysCommand(nID, lParam);
}
}
// If you add a minimize button to your dialog, you will need the code below
// to draw the icon. For MFC applications using the document/view model,
// this is automatically done for you by the framework.
void CMouse_MessagesDlg::OnPaint()
{
if (IsIconic())
{
CPaintDC dc(this); // device context for painting
SendMessage(WM_ICONERASEBKGND, reinterpret_cast(dc.GetSafeHdc()), 0);
// Center icon in client rectangle
int cxIcon = GetSystemMetrics(SM_CXICON);
int cyIcon = GetSystemMetrics(SM_CYICON);
CRect rect;
GetClientRect(&rect);
int x = (rect.Width() - cxIcon + 1) / 2;
int y = (rect.Height() - cyIcon + 1) / 2;
// Draw the icon
dc.DrawIcon(x, y, m_hIcon);
}
else
{
CDialogEx::OnPaint();
rect.SetRect(10,10,600,350);
mainWindow();
}
}
// The system calls this function to obtain the cursor to display while the user drags
// the minimized window.
HCURSOR CMouse_MessagesDlg::OnQueryDragIcon()
{
return static_cast(m_hIcon);
}
void CMouse_MessagesDlg::OnBnClickedBtnColor()
{
CColorDialog dlg(color, CC_FULLOPEN);
int res = dlg.DoModal();
if (res == IDOK)
{
color = dlg.GetColor();
}
}
void CMouse_MessagesDlg::OnMouseMove(UINT nFlags, CPoint point)
{
CClientDC painter(this);
CPen pen(PS_DOT,2,color);
if(nFlags == MK_LBUTTON)
{
if(flagBtn == 1) //Rectangle
{
Invalidate();
UpdateWindow();
rect.SetRect(point,oldPoint);
painter.SelectObject(pen);
painter.Rectangle(rect);
}
}
CDialogEx::OnMouseMove(nFlags, point);
}
void CMouse_MessagesDlg::OnLButtonDown(UINT nFlags, CPoint point)
{
oldPoint = point;
CDialogEx::OnLButtonDown(nFlags, point);
}
void CMouse_MessagesDlg::paintRect()
{
CClientDC painter(this);
CPen pen(PS_DOT,2,color);
painter.SelectObject(pen);
painter.Rectangle(rect);
}
void CMouse_MessagesDlg::mainWindow()
{
CClientDC painter(this);
CPen pen(PS_DOT,2,RGB(0,0,0));
painter.SelectObject(pen);
painter.Rectangle(rect);
}
void CMouse_MessagesDlg::OnBnClickedRect()
{
flagBtn = 1;
}
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